Genetic selection for lifetime reproductive performance
نویسندگان
چکیده
منابع مشابه
Sow feed intake and lifetime reproductive performance
For many breeding companies, performance testing in maternal lines is generally confined to traits such as average daily gain (ADG), back fat (BF) and perhaps loin muscle depth or area (LMD or LMA), along with litter size traits such as number born alive (NBA) or total born (TB). More sophisticated breeding programs will also accommodate traits associated with sow performance, longevity or pigl...
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In this study phenotypic and genetic factors affecting the reproductive efficiency of Lori-Bakhtiari ewes were determined using 8202 reproductive records of 2478 ewes collected at Shooli research station in the southwestern part of Iran (Shahrekord) during 1989 to 2012. Reproductive efficiency over all consecutive lambing opportunities were calculated by adding the total reproductive efficiency...
متن کاملLifetime reproductive success and density-dependent, multi-variable resource selection.
Individuals are predicted to maximize lifetime reproductive success (LRS) through selective use of resources; however, a wide range of ecological and social processes may prevent individuals from always using the highest-quality resources available. Resource selection functions (RSFs) estimate the relative amount of time an individual spends using a resource as a function of the proportional av...
متن کاملSelection Strategies for the Genetic Improvement of Reproductive Performance in Sheep
Selection strategies for the genetic improvement of reproductive performance of sheep in Australia are discussed in the context of current and emerging industry practice. The predicted rates of gain in reproductive rate are compared with varying amounts of pedigree and performance records of relatives. The paper also considers the merits of exploiting indirect as well as direct selection, inclu...
متن کاملGenetic relationships between selection for growth and reproductive effectiveness.
The domestic and international poultry industries have gone through many changes over the last 50 yr. One constant in the meat-type poultry industry has been the emphasis on genetic improvement of growth. Using lines from a double, divergent selection experiment, data are presented on the genetic relationships between growth to different ages and reproductive parameters. During the last three g...
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ژورنال
عنوان ژورنال: Bioscientifica Proceedings
سال: 2020
ISSN: 2515-0227
DOI: 10.1530/biosciprocs.18.0033